content: /**
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
   * compliance with the License. You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software distributed under the License is
   * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
   * the License for the specific language governing permissions and limitations under the License.
   */
  
  package io.reactivex.flowable.internal.operators;
  
  import java.util.concurrent.TimeoutException;
  import java.util.concurrent.atomic.AtomicReference;
  
  import org.reactivestreams.*;
  
  import hu.akarnokd.reactivestreams.extensions.RelaxedSubscriber;
  import io.reactivex.common.*;
  import io.reactivex.common.exceptions.Exceptions;
  import io.reactivex.common.functions.Function;
  import io.reactivex.common.internal.disposables.DisposableHelper;
  import io.reactivex.common.internal.functions.ObjectHelper;
  import io.reactivex.flowable.Flowable;
  import io.reactivex.flowable.internal.subscribers.FullArbiterSubscriber;
  import io.reactivex.flowable.internal.subscriptions.*;
  import io.reactivex.flowable.subscribers.*;
  
  public final class FlowableTimeout<T, U, V> extends AbstractFlowableWithUpstream<T, T> {
      final Publisher<U> firstTimeoutIndicator;
      final Function<? super T, ? extends Publisher<V>> itemTimeoutIndicator;
      final Publisher<? extends T> other;
  
      public FlowableTimeout(
              Flowable<T> source,
              Publisher<U> firstTimeoutIndicator,
              Function<? super T, ? extends Publisher<V>> itemTimeoutIndicator,
              Publisher<? extends T> other) {
          super(source);
          this.firstTimeoutIndicator = firstTimeoutIndicator;
          this.itemTimeoutIndicator = itemTimeoutIndicator;
          this.other = other;
      }
  
      @Override
      protected void subscribeActual(Subscriber<? super T> s) {
          if (other == null) {
              source.subscribe(new TimeoutSubscriber<T, U, V>(
                      new SerializedSubscriber<T>(s),
                      firstTimeoutIndicator, itemTimeoutIndicator));
          } else {
              source.subscribe(new TimeoutOtherSubscriber<T, U, V>(
                      s, firstTimeoutIndicator, itemTimeoutIndicator, other));
          }
      }
  
      static final class TimeoutSubscriber<T, U, V> implements RelaxedSubscriber<T>, Subscription, OnTimeout {
          final Subscriber<? super T> actual;
          final Publisher<U> firstTimeoutIndicator;
          final Function<? super T, ? extends Publisher<V>> itemTimeoutIndicator;
  
          Subscription s;
  
          volatile boolean cancelled;
  
          volatile long index;
  
          final AtomicReference<Disposable> timeout = new AtomicReference<Disposable>();
  
          TimeoutSubscriber(Subscriber<? super T> actual,
                  Publisher<U> firstTimeoutIndicator,
                  Function<? super T, ? extends Publisher<V>> itemTimeoutIndicator) {
              this.actual = actual;
              this.firstTimeoutIndicator = firstTimeoutIndicator;
              this.itemTimeoutIndicator = itemTimeoutIndicator;
          }
  
          @Override
          public void onSubscribe(Subscription s) {
              if (!SubscriptionHelper.validate(this.s, s)) {
                  return;
              }
              this.s = s;
  
              if (cancelled) {
                  return;
              }
  
              Subscriber<? super T> a = actual;
  
              Publisher<U> p = firstTimeoutIndicator;
  
              if (p != null) {
                  TimeoutInnerSubscriber<T, U, V> tis = new TimeoutInnerSubscriber<T, U, V>(this, 0);
  
                  if (timeout.compareAndSet(null, tis)) {
                      a.onSubscribe(this);
                      p.subscribe(tis);
                  }
              } else {
                  a.onSubscribe(this);
              }
          }
  
          @Override
          public void onNext(T t) {
              long idx = index + 1;
              index = idx;
  
              actual.onNext(t);
  
              Disposable d = timeout.get();
              if (d != null) {
                  d.dispose();
              }
  
              Publisher<V> p;
  
              try {
                  p = ObjectHelper.requireNonNull(itemTimeoutIndicator.apply(t), "The publisher returned is null");
              } catch (Throwable e) {
                  Exceptions.throwIfFatal(e);
                  cancel();
                  actual.onError(e);
                  return;
              }
  
              TimeoutInnerSubscriber<T, U, V> tis = new TimeoutInnerSubscriber<T, U, V>(this, idx);
  
              if (timeout.compareAndSet(d, tis)) {
                  p.subscribe(tis);
              }
          }
  
          @Override
          public void onError(Throwable t) {
              cancel();
              actual.onError(t);
          }
  
          @Override
          public void onComplete() {
              cancel();
              actual.onComplete();
          }
  
          @Override
          public void request(long n) {
              s.request(n);
          }
  
          @Override
          public void cancel() {
              cancelled = true;
              s.cancel();
              DisposableHelper.dispose(timeout);
          }
  
          @Override
          public void timeout(long idx) {
              if (idx == index) {
                  cancel();
                  actual.onError(new TimeoutException());
              }
          }
      }
  
      interface OnTimeout {
          void timeout(long index);
  
          void onError(Throwable e);
      }
  
      static final class TimeoutInnerSubscriber<T, U, V> extends DisposableSubscriber<Object> {
          final OnTimeout parent;
          final long index;
  
          boolean done;
  
          TimeoutInnerSubscriber(OnTimeout parent, final long index) {
              this.parent = parent;
              this.index = index;
          }
  
          @Override
          public void onNext(Object t) {
              if (done) {
                  return;
              }
              done = true;
              cancel();
              parent.timeout(index);
          }
  
          @Override
          public void onError(Throwable t) {
              if (done) {
                  RxJavaCommonPlugins.onError(t);
                  return;
              }
              done = true;
              parent.onError(t);
          }
  
          @Override
          public void onComplete() {
              if (done) {
                  return;
              }
              done = true;
              parent.timeout(index);
          }
      }
  
      static final class TimeoutOtherSubscriber<T, U, V> implements RelaxedSubscriber<T>, Disposable, OnTimeout {
          final Subscriber<? super T> actual;
          final Publisher<U> firstTimeoutIndicator;
          final Function<? super T, ? extends Publisher<V>> itemTimeoutIndicator;
          final Publisher<? extends T> other;
          final FullArbiter<T> arbiter;
  
          Subscription s;
  
          boolean done;
  
          volatile boolean cancelled;
  
          volatile long index;
  
          final AtomicReference<Disposable> timeout = new AtomicReference<Disposable>();
  
          TimeoutOtherSubscriber(Subscriber<? super T> actual,
                  Publisher<U> firstTimeoutIndicator,
                  Function<? super T, ? extends Publisher<V>> itemTimeoutIndicator, Publisher<? extends T> other) {
              this.actual = actual;
              this.firstTimeoutIndicator = firstTimeoutIndicator;
              this.itemTimeoutIndicator = itemTimeoutIndicator;
              this.other = other;
              this.arbiter = new FullArbiter<T>(actual, this, 8);
          }
  
          @Override
          public void onSubscribe(Subscription s) {
              if (!SubscriptionHelper.validate(this.s, s)) {
                  return;
              }
              this.s = s;
  
              if (!arbiter.setSubscription(s)) {
                  return;
              }
              Subscriber<? super T> a = actual;
  
              Publisher<U> p = firstTimeoutIndicator;
  
              if (p != null) {
                  TimeoutInnerSubscriber<T, U, V> tis = new TimeoutInnerSubscriber<T, U, V>(this, 0);
  
                  if (timeout.compareAndSet(null, tis)) {
                      a.onSubscribe(arbiter);
                      p.subscribe(tis);
                  }
              } else {
                  a.onSubscribe(arbiter);
              }
          }
  
          @Override
          public void onNext(T t) {
              if (done) {
                  return;
              }
              long idx = index + 1;
              index = idx;
  
              if (!arbiter.onNext(t, s)) {
                  return;
              }
  
              Disposable d = timeout.get();
              if (d != null) {
                  d.dispose();
              }
  
              Publisher<V> p;
  
              try {
                  p = ObjectHelper.requireNonNull(itemTimeoutIndicator.apply(t), "The publisher returned is null");
              } catch (Throwable e) {
                  Exceptions.throwIfFatal(e);
                  actual.onError(e);
                  return;
              }
  
              TimeoutInnerSubscriber<T, U, V> tis = new TimeoutInnerSubscriber<T, U, V>(this, idx);
  
              if (timeout.compareAndSet(d, tis)) {
                  p.subscribe(tis);
              }
          }
  
          @Override
          public void onError(Throwable t) {
              if (done) {
                  RxJavaCommonPlugins.onError(t);
                  return;
              }
              done = true;
              dispose();
              arbiter.onError(t, s);
          }
  
          @Override
          public void onComplete() {
              if (done) {
                  return;
              }
              done = true;
              dispose();
              arbiter.onComplete(s);
          }
  
          @Override
          public void dispose() {
              cancelled = true;
              s.cancel();
              DisposableHelper.dispose(timeout);
          }
  
          @Override
          public boolean isDisposed() {
              return cancelled;
          }
  
          @Override
          public void timeout(long idx) {
              if (idx == index) {
                  dispose();
                  other.subscribe(new FullArbiterSubscriber<T>(arbiter));
              }
          }
      }
  }
  